Yes, you can read other people's messages by installing a mobile application on someone else's phone. The application works in invisible mode and sends all received and sent SMS to your account, where you can read them.
The application works on all smartphones Android, iPhone and Blackberry. It can be installed in 5 minutes and the installation process is quite simple - just copy the boot link to the phone's browser and upload it to your phone.
GPS coordinates in real time, this is not the only thing that tracks on your phone, here's a partial list of features and features of this application.